Liquid sprayer



Oct. 2, 1962 VOGEL JR 3,056,560

LIQUID SPRAYER Filed Sept. 2, 1960 2 Sheets-Sheet l Oct. 2, 1962 w. M. VOGEL, JR

LIQUID SPRAYER 2 Sheets Sheet 2 Filed Sept. 2, 1960 United States Patent ()filice 3,055,560 Patented Def. 2, 1%52 Filed Sept. 2, 1969, Ser. No. 53,739 3 Claims. (Cl. 239-361) This invention relates to a device for atomizing and spraying a liquid insecticide of the general type disclosed in United States Patents Nos. 2,194,339, 2,233,161, and 2,178,088, wherein the movement of a piston in a cylinder draws liquid into a spray head having one or more apertures or orifices through which the liquid is atomized and sprayed upon the forward movement of the piston in the cylinder.

One object of the invention is to provide in a sprayer of this type, a spray head embodying a novel and improved construction and combination of a main plate member Which shall also constitute an end closure for the cylinder of the device and shall have an outwardly extending projection provided with two or more atomizing orifices in its front wall, and an auxiliary plug-like rear member snugly telescopically fitted into the inner side of said projection and having an orifice in a front portion thereof in axially spaced and aligned relation to each orifice in the main plate member, and means for positively positioning or locating and holding said auxiliary plug-like member with its front wall in properly spaced relation to the front wall of said projejction of the main or front member, whereby the auxiliary member shall always be applied to said projection with the orifices properly aligned and air forced from the cylinder by the piston shall be projected through said orifices, and the liquid shall be mixed with air in the mixing chamber between said main member and said auxiliary member and atomized and projected in the form of a cloud or finely diffused spray.

Another object of the invention is to provide such a spray head wherein both said main member and said auxiliary member are formed of sheet metal and said projection of the main member shall be die-pressed, said auxiliary rear member shall have a perimetral flange to abut the inner surface of said main member and shall also have a projection die-pressed therefrom to snugly fit into the recess formed on the inner side of said projection of the main plate member, whereby said flange shall positive- 1y locate the front walls on the projections of said main and auxiliary members in properly spaced relation to each other.

A further object of the invention is to provide a novel and improved construction and combination of a main member and an auxiliary member as hereinbefore described wherein the air pressure incident to operation of the pump will tend to force said auxiliary member into the recess of the main member and said flange of the auxiliary member will limit such movement of the auxiliary member.

Other objects, advantages and results of the invention will be brought out by the following description in conjunction with the accompanying drawings in which FIGURE 1 is a side elevation of the spraying device embodying the invention in combination with a container for the liquid to be sprayed;

FIGURE 2 is an enlarged front end elevation of the spraying device, showing the spray head with portions of the container omitted and with portions of the projection of the main member broken away and shown in section;

FIGURE 3 is a central vertical longitudinal sectional view through the spray head approximately on the plane of the line 3--3 of FIGURE 2 with portions of the cylinder and liquid container omitted;

FIGURE 4 is a transverse vertical sectional view approximately on the plane of the line 44 of FIGURE 3;

FIGURE 5 is a horizontal sectional view approximately on the plane of the line 5-5 of FIGURE 2, with portions of the pump cylinder and portions of the liquid container omitted; and

FIGURE 6 is a fragmentary transverse vertical sectional view approximately on the plane of the line 66 of FIGURE 3.

Specifically describing the embodiment of the invention shown in FIGURES 1 to 6 inclusive, the reference character A designates the cylinder of the spraying device that is usually formed of sheet metal or the like and is closed at one end by a cap B through which extends and projects the piston rod C of a piston D for forcing air through the outlet or discharge orifies of a spray head generally designated E. The piston rod C has the usual handle F and the piston has a flexible packing cup G of leather or other suitable material.

At the end of the cylinder opposite the cap B and adjacent the spray head is a baffle member 1-1 that closes the end of the cylinder except for an opening I in the upper portion of the bafile through which the air passes from the cylinder to the spray head.

The spray head E includes a main or front plate member 1 whose marginal edge has an interlocking seam 2 with a returned flange 3 on the end of the cylinder A. The peripheral edge 4 of the baffle member H is clamped between the flange 3 of the main plate 1 and the end of the cylinder as best shown in FIGURE 3.

The main plate member 1 is preferably formed of stiff sheet material such as metal and has an integral forwardly extending projection 5 that is cup-shaped in cross section and preferably polygonal. As shown, the projection has side walls 5a projecting angularly from the central portion of the main plate and disposed in angular relation to each other, and a front wall 517 integrally connected to said side walls. The front wall has an elongated protuberance 5c that lies approximately in a diametral plane of the cylinder and in which are spraying orifices 6 that are disposed and spaced apart in said diametral plane of the cylinder; and the upper and lower portions 5d of said front wall diverge rearw'ardly from said protuberance.

A plug-like rear auxiliary member 7 of the spray head is telescopically fitted into the inner side of the projection 5 of the main member as best shown in FIGURES 3 and 5. The member 7 includes side walls 7a that snugly engage the corresponding side walls 5a of the projection 5, and a front wall 7]) that has a forwardly extending protuberance 7c in spaced juxtaposed and parallel relation to the protuberance 5c and in which are spray orifices 8, each in axial alignment with one of the orifices 6 and preferably somewhat larger in diameter than the orifices 6. The auxiliary member also has a perimetral flange 7e perpendicular to the walls 7a and 7b, which abuts the inner side of the main member 1 to hold the front walls 5b and 7b in properly spaced relation to each other.

Extending downwardly from the protuberance 5c of the front main plate member 1 is another protuberance 5e that provides a seat and clearance for the siphon tube 9 that is shown as sealed in the cap It of the liquid container I as indicated at 11. The end of the tube extends into the space between the main member and auxiliary member at one side of the common plane of the axes of the orifices, as best shown in FIGURES 3 and 5.

It will be understood that the cap 10 will be firmly attached to the cylinder so that upon forward movement of the piston D, air will be forced from the cylinder through the opening I and the orifices 6' and 8 so as to draw liquid through the siphon tube 9 into the mixing chamber between the main and auxiliary members of the spray head and cause a thorough mixing of the air and liquid and atomization of the liquid as the jet passes through the orifices. As shown, there will be a jet projected from each of the orifices 3 and the two jets will intersect each other. The spray head thus insures a thorough or high degree of atomization, a cloud-like spray of finely divided and uniformly diffused particles of liquid that are projected considerable distances from the spray head, thereby to insure a large output of liquid spray over a large area of space, rapidly and efficiently. The space between the main and auxiliary members provides for accumulation of a substantial quantity of finely divided liquid, thereby to insure continuity of the spray. The protuberances 5c and direct the air and the liquid particles to the respective orifices 6 and 8 and increase the velocity of the flow of air and the atomized liquid through the orifices. It wil also be observed that no dripping of the liquid from the orifices can occur after the spraying operation has stopped.

The invention also provides a spraying device, the parts of which are simple, minimum in number, and can be easily and quickly assembled. The main and auxiliary spray head members can be readily die-pressed from sheet material and the plug-like auxiliary member can be easily and quickly fitted into the recess formed at the inner side of the projection of the main member. The corresponding polygonal shapes of auxiliary member and the project-ion of the main member, with the snug fit of the auxiliary member in the main member, make it possible to obtain easily accurate alignment of the orifices of the main and auxiliary member. The perimetral flange 8 of the auxiliary member is preferably circular and extends beyond the projection '7 perpendicular to the Walls 7a so as to flatly abut the inner surface of the main member around the recess on the inner side of the projection as best shown in FIGURES 3 and 5 and thereby limit the extent of insertion of the projection of the auxiliary member into the projection 5 of the main member so as to properly locate the front wall 71) in properly spaced relation to the front wall Sb of the projection on the main member. The flange 8 also facilitates gripping of the auxiliary member for insertion of the projection thereof into the recess of the main member. The air pressure incident to operation of the pump tends to force the auxiliary member into snug contact with the main member and the perimetral flange limits such movement of the auxiliary member. Therefore, it is only necessary that the auxiliary member have a frictional engagement with the main member, soldering and other fastening means being obviated.

While the now preferred embodiment of the invention has been illustrated and described for the purpose of explaining the principles of the invention, modifications and changes in the structural details of the sprayer and the spray head can be made within the spirit and scope of the invention.

'I claim:

1. A liquid sprayer comprising a cylinder, a piston therein for spraying air under pressure, and a spray head including a main sheet metal chamber member secured on and closing one end of said-cylinder and having a cupshaped integral forwardly extending projection including side walls and a front wall providing a recess on the inner side of said main member, the inner surface of said main member having a flat area surrounding said recess and in a plane perpendicular to said side walls, said front wall being provided with a plurality of orifices for passage of air from said cylinder, and a plug-like sheet metal auxiliary member having a projection formed with side walls and a front wall and surrounded by a flat perimetral flange that lies in a plane perpendicular to said side walls, said projection of the auxiliary member being of a shape corresponding to said projection of said main member and frictionally fitted into said recess of the main member with said perimetral flange abutting said fiat area of the inner surface of the main member, the side walls of said auxiliary member being in frictional telescopic contact with the side Walls of said recess of the main member, and the front wall of said auxiliary member being in spaced relation to the front wall of said projection on the main member forming a chamber between said main member and auxiliary member, said front wall of the auxiliary member having orifices in alignment with the orifices in said front wall of the main member, and a liquid supplying tube leading into said chamber.

2. A liquid sprayer as defined in claim 1 wherein said projection of said main member has an opening in its side wall and a protuberance in its front wall providing a groove on the inner side of said Wall facing inwardly from said opening, and wherein said liquid supplying tube extends through said opening and is exposed in said groove with one end in said chamber for conducting liquid from a source of supply to said chamber.

3. A liquid sprayer as defined in claim 2 wherein said front wall on the projection of the main member has a second protuberance disposed perpendicularly to the firstmentioned protuberance providing a groove on the inner side of said wall and having orifices therein, and the front wall of the projection on said auxiliary member has a protuberance corresponding in shape with and juxtaposed to and spaced from said groove in the first-mentioned protuberance and the second-mentioned orifices therein.

References Cited in the file of this patent UNITED STATES PATENTS 2,178,088 Vogel Oct. 31, 1939 2,194,339 Vogel Mar. 19, 1940 2,233,161 Fitch Feb. 25, 1941 2,639,192 Fletcher May 19, 1953 2,961,170 Vogel Nov. 23, 196i) 

